Mohamed Abdel-Rahman

• Ain Shams University

The need for the redesign of electricity end user rates when faced with the increasing adoption of behind-the-meter (BTM) technologies, such as solar PV and batteries, has been well documented in the context of liberalised power sectors. This paper focusses on rate design for North African utilities. Applying a game-theoretical model, we illustrate...

The need for the redesign of electricity end user rates when faced with the increasing adoption of behind-the-meter (BTM) technologies, such as solar PV and batteries, has been well documented in the context of liberalised power sectors. This paper focusses on rate design for North African utilities. Applying a game-theoretical model, we illustrate...

Recent cost development of Photovoltaic system has pushed for increasing penetration of distributed roof-top application. This increased penetration has been supported by different policy schemes. This paper proposes an approach to quantify the impact of the net-metering scheme in addition to a new implementation strategy of net-metering that balan...

RSC 2021/45 Robert Schuman Centre for Advanced Studies Florence School of Regulation

This paper presents an approach to obtain reduced-order models for power networks involving power electronic converters (PEC) via the frequency-domain balanced realizations (FDBR) technique. PECs play an essential role in power processing and energy conversion in modern electrical networks, such as the interconnection of renewable generators, HVDC...

This study presents an experimental investigation on the effect of using different conductive fillers; steel shavings, carbon powder and graphite powder as partial replacement of fine aggregate (1%, 3%, 5% and 7% by volume) on the electrical, physical, mechanical and durability properties of structural concrete. The effect of including different co...

Power networks are, in nature, nonlinear time-variant systems. Starting with synchronous machines, which function as generators, passing by transmission and distribution networks whose topologies are altered due to different switching actions in the network, and ending with uncontrolled loads, which depend to a large extent on customer behavior and...

This study presents a new scheme for a continuously variable (CV) series braking resistor (SBR) with independent per phase controller. The CV-SBR is a CV and not stepwise. A novelty of the work presented is that the CV-SBR operates on the whole range of wind speeds. The proposed scheme is applicable to fault ride-through (FRT) of fixed speed wind t...

This paper reviews and applies the balanced realization (BR) theory to obtain reduced-order models from dynamic system equivalents of electric power networks. BR allows obtaining reduced-order models via a process in which the original asymptotic stable system is internally balanced. The balanced system is truncated according to its dominant dynami...

This paper presents new series grid interface topologies for enhancing the low voltage ridethrough capability of self-excited induction generator-based wind turbines. Two proposed schemes: static synchronous series compensator (SSSC) and controllable series braking resistor (CSBR) have been designed and simulated. The test system simulated represen...

Wind energy is one of the most promising electricity generating sources as a clean and free alternate compared with the conventional power plants and due to the volatility feature in the wind speeds it will reflect some problems in power systems reliability particularly if the system is deeply penetrated by wind farms. Therefore, wind power forecas...

This article characterizes low-voltage ride-through capability of wind farms. Critical clearing time has been used in the literature as a measure of the transient stability of induction generators and, hence, an indication for low-voltage ride-through capability of single wind turbine generators. Therefore, this article aims to aggregate entire win...

In this paper, we introduce an alternative novel technique to approximate step response in time domain based on rational function approximation of admittance. The proposed technique sustains multi-port networks and passive RLC output. An application for this technique, viz., package modeling is presented in this paper. We verify the proposed techni...

In this paper, we describe a methodology for the efficient extraction and model order reduction of large on-chip interconnects. We propose a methodology that results in simulation time reduction by at least an order of magnitude, compared to commercial model order reduction software, by adopting frequency domain vector fitting to reduce the number...

Demand Side Management (DSM) is presently gaining momentum in nearly all the world. Lack of primary energy resources, lack of generation capacity, and the need to reduce emissions all combined together are pushing world utilities into exploring the extent DSM techniques can play in their favor. To that end, a cheap and reliable communication means...

Electrical energy consumers are demanding better customer service, higher power quality, higher energy measurement accuracy and more timely data. Utility companies all over the world are being forced to find solutions giving greater information on the population's power consumption. The Automatic Meter Reading system (AMR) is one of the ways in whi...

Distributed generation is a form of electric power privatization. Consumers install their own power station to supply the local loads and/or share in the utility loads. Many protective problems have been developed due to the existence of these distributed generators. However, a protective strategy should be developed to protect the system and the g...

This paper investigates the modeling of thermostatic loads. Thermostatic loads are those loads operated by a thermostat. Due to their physical nature they exhibit periodic behaviour. Modeling of this class of loads is a challenge to predict the system performance especially when the system is operated near to its operational limits. The established...

The modeling and simulation. of a IkW vertical-axis direct drive topology wind turbine are implemented. An axial nux permanent magnet synchronous generator with multi-pole Is directly connected to the wind turbine shaft. The wind turbine system is controlled to operate at constant tip-speed ratio and hen~e maximizing the power extracted from the wi...

First Page of the Article

The frequency spectrum of an external system used in the simulation of electromagnetic transients shows many peaks due to resonance effects of the leading transmission lines. Therefore, the two-level equivalent we developed contains simplified lines for the leading part of the system and lumped elements represented by rational functions as a correc...

1 – This paper is an effort to develop an FPGA-based real-time digital simulator. FPGA is used instead of parallel processors to simulate electromagnetic transients in power systems. A sample single-phase test systems was used to examine the principle. The mathematical model for the power system under consideration is implemented and simulated usin...

INTRODUCTION One of the major tasks of the regulator is to overview the tariff in the electricity market. This paper develops a measure for the customer stress due to a tariff change, termed the customer stress index. A procedure has been developed to provide a tariff change to satisfy utility financial needs, while minimizing the customer stress i...